1. Assistant Professor, Faculty of Technology, Uttar Banga Krishi Viswavidyalaya, Cooch Behar, India 736165; Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India 721302.
2. Associate Professor, Dept. of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, India 721302 (corresponding author).